Logeshwaran Natarajan, Panneerselvam Iyyappa Rajan, Ramakrishnan Shanmugam, Kumar Ramasamy Santhosh, Kim Ae Rhan, Wang Yan, Yoo Dong Jin
Graduate School, Department of Energy Storage/Conversion Engineering (BK21 FOUR), Hydrogen and Fuel Cell Research Center, Jeonbuk National University, Jeonju, Jeollabuk-do, 54896, Republic of Korea.
Department of Mechanical Engineering, University of Nevada, Reno, Reno, NV, 89557, USA.
Adv Sci (Weinh). 2022 Mar;9(8):e2105344. doi: 10.1002/advs.202105344. Epub 2022 Jan 20.
The development of efficient and highly durable materials for renewable energy conversion devices is crucial to the future of clean energy demand. Herein, cage-like quasihexagonal structured platinum nanodendrites decorated over the transition metal chalcogenide core (CoS )-N-doped graphene oxide (PtNDs@CoS -NrGO) through optimized shape engineering and structural control technology are fabricated. The prepared electrocatalyst of PtNDs@CoS -NrGO is effectively used as anodic catalyst for alcohol oxidation in direct liquid alcohol fuel cells. Notably, the prepared PtNDs@CoS -NrGO exhibits superior electrocatalytic performance toward alcohol oxidation with higher oxidation peak current densities of 491.31, 440.25, and 438.12 mA mg for (methanol) C1, (ethylene glycol) C2, and (glycerol) C3 fuel electrolytes, respectively, as compared to state-of-the-art Pt-C in acidic medium. The electro-oxidation durability of PtNDs@CoS -NrGO is investigated through cyclic voltammetry and chronoamperometry tests, which demonstrate excellent stability of the electrocatalyst toward various alcohols. Furthermore, the surface and adsorption energies of PtNDs and CoS are calculated using density functional theory along with the detailed bonding analysis. Overall, the obtained results emphasize the advances in effective precious material utilization and fabricating techniques of active electrocatalysts for direct alcohol oxidation fuel cell applications.
开发用于可再生能源转换装置的高效且高度耐用的材料对于满足未来清洁能源需求至关重要。在此，通过优化的形状工程和结构控制技术，制备了在过渡金属硫族化物核（CoS ）-氮掺杂氧化石墨烯（PtNDs@CoS -NrGO）上装饰的笼状准六边形结构铂纳米枝晶。所制备的PtNDs@CoS -NrGO电催化剂被有效地用作直接液体酒精燃料电池中酒精氧化的阳极催化剂。值得注意的是，与酸性介质中最先进的Pt-C相比，所制备的PtNDs@CoS -NrGO对酒精氧化表现出优异的电催化性能，对于（甲醇）C1、（乙二醇）C2和（甘油）C3燃料电解质，其氧化峰电流密度分别更高，为491.31、440.25和438.12 mA mg 。通过循环伏安法和计时电流法测试研究了PtNDs@CoS -NrGO的电氧化耐久性，结果表明该电催化剂对各种酒精具有出色的稳定性。此外，利用密度泛函理论以及详细的键合分析计算了PtNDs和CoS的表面能和吸附能。总体而言，所得结果强调了在直接酒精氧化燃料电池应用中有效利用贵金属材料和制造活性电催化剂技术方面取得的进展。
